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1. AU2003232632 - Digital linear filter-type equalizer

Office
Australia
Application Number 2003232632
Application Date 17.05.2003
Publication Number 2003232632
Publication Date 28.08.2003
Publication Kind A
IPC
H04L 25/03
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
CPC
H04L 25/03038
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
03006Arrangements for removing intersymbol interference
03012operating in the time domain
03019adaptive, i.e. capable of adjustment during data reception
03038with a non-recursive structure
H04L 2025/03624
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
03006Arrangements for removing intersymbol interference
03592Adaptation methods
03598Algorithms
03611Iterative algorithms
03617Time recursive algorithms
03624Zero-forcing
Applicants FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Inventors Pohl, Volker
Priority Data 10223445 23.05.2002 DE
Title
(EN) Digital linear filter-type equalizer
Abstract
(EN)
The invention relates to a frequency-selective MIMO channel for the wireless transmission of data which can be generally described by a system of coupled differential equations of the Nth order from which the general shape of a linear zero-forcing filter for the channel can be derived. If the structure of the latter is completely elucidated, digital, linear filter-type equalizers are used to completely remove all inter-channel and inter-symbol noise that is caused by spatial and temporal crosstalk. When performing an especially favorable, arithmetic transformation of the filter function, the inventive filter-type equalizers allow a largely simplified representation of the equation system of the Nth order as an equation system of the first order which exactly corresponds to the channel structure and can be realized in real time by means of a pure hardware configuration. Due to the limitation to asymmetric MIMO channels having a spatial deviation, the inventive filter-type equalizer can be substantially reduced in size. The arithmetic complexity of the inventive filter-type equalizer is very small despite its high capacity. Depending on the antenna configuration, equalizing can be performed on the receiver or on the transmitter side. In order to additionally remove noise, a combined filter-type equalizer can be used on the receiver end.

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